/* 去掉所有元素的内外边距 */

html,
body,
div,
span,
h1,
h2,
h3,
h4,
h5,
h6,
p,
pre,
a,
img,
ul,
li,
form,
label,
input,
table,
tbody,
tfoot,
thead,
tr,
th,
td,
audio,
video {
    margin: 0;
    padding: 0;
}


/* 统一全局字体 */

body {
    font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif
}


/* 列表元素去掉默认的列表样式 */

ol,
ul {
    list-style: none;
}


/* Table元素的边框折叠 */

table {
    border-collapse: collapse;
    border-spacing: 0;
}


/* 去掉默认的下划线 */

a {
    text-decoration: none;
}


/* 去掉input自带的边缘效果和背景颜色 */

input {
    outline: none;
    background: none;
}